[v3, constexpr] intial conversion to constexpr

[Benjamin Kosnik]

Here is a preliminary patch for libstdc++/* files on the constexpr
branch. As is, this doesn't compile: ICE's in atomics, some issues in
random with the max() conversion, etc. But is is a useful starting
point.

Testing the constexpr branch on linux, I see some extra fails. I'm
assuming these are expected. 

Should I work on adding in the additional tests I did some months ago
to the g++ testsuite? I suppose the branch should be documented as well.

-benjamin
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 20100715-1.patch
Type: text/x-patch
Size: 22579 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/libstdc++/attachments/20100716/662f2a21/attachment.bin>